Electrification apparatus for electric dust collection and control method therefor

ABSTRACT

The present invention relates to an electrification apparatus for electric dust collection and a control method therefor. According to the teachings of the present invention, there is provided an electrification apparatus for electric dust collection including: a frame, conductive, and conductive plates. The electrification apparatus further includes a ground unit which is disposed between the conductive microfiber and the conductive plate. At this time, the ground unit is insulated when a high voltage is applied to the conductive microfiber and is connected to the ground electrode when a high voltage is blocked to the conductive microfiber.

CLAIM OF PRIORITY

This application claims priority to Korean Patent Application Serial No.10-2018-0085533 filed Jul. 23, 2018, the entire contents of which arehereby incorporated by reference.

BACKGROUND

The present invention relates to an electrification apparatus forelectric dust collection and a control method therefor.

An electrification apparatus for electric dust collection is anapparatus for removing dust particles in the air. Generally, theelectrification apparatus for electric dust collection includes a highvoltage application unit for generating ions into the air, and a groundelectrode application unit for forming an electric field with the highvoltage application unit.

The dust particles in the air are electrified by the ions generated inthe high voltage application unit, and the electrified dust particles inthe ground electrode application unit can be collected. In addition, theelectrification apparatus for electric dust collection may be providedtogether with a separate collector. The electrification apparatus andthe collector may be collectively referred to as an electric dustcollector or an electric dust collection assembly.

The electrification apparatus for electric dust collection can generallybe installed in a predetermined product. In addition, theelectrification apparatus for electric dust collection can beindependently installed in the air to remove dust in the air.

For example, the electrification apparatus for electric dust collectionmay be installed in various products such as an air conditioner, an airpurifier, and a humidifier. Particularly, the electrification apparatusfor electric dust collection can be installed inside an air conditionerfor a vehicle.

At this time, the present applicant has filed and disclosed thefollowing related art relating to an ion generating device thatgenerates ions in the air to remove dust particles in the air.

<Related Art 1>

1. Korea patent publication number: 10-2017-0020102 (publication date:Feb. 22, 2017)

2. Title of the Invention: Ion generating device

As disclosed in the related art 1, the ion generating device includes adischarge electrode that discharges by a high voltage to ionizemolecules in the air. In addition, the ion generating device furtherincludes a ground electrode which is disposed apart from the dischargeelectrode and which is grounded. At this time, the ground electrodefunctions to remove surplus ions among the ions generated by thedischarge electrode to maintain a discharge current.

The related art 1 has the following problems.

(1) As in a case of the discharge electrode, in a case where themolecules in the air are ionized by discharging, the peripheralnon-conductors may be electrified. In order to prevent this, the groundelectrode is disposed in the related art 1, but the non-conductordisposed between the discharge electrode and the ground electrode iscontinuously electrified.

(2) Particularly, there is a problem that the performance of thedischarge electrode is greatly deteriorated as a support portion forfixing the discharge electrode at a predetermined position iselectrified. As a result, there is a problem the electrificationperformance is deteriorated and the dust particles in the air cannot beeffectively removed.

(3) In addition, a separate member (ground electrode) is required toprevent the non-conductor from being electrified. Accordingly, thematerial cost increases, the degree of freedom in installationdecreases, and the manufacturing process takes a relatively long time.

SUMMARY

In order to solve such a problem, an objective of the present embodimentis to propose an electrification apparatus for electric dust collectionto prevent electrification of a non-conductor through a simple switchingcircuit and a control method therefor.

In addition, an objective of the present invention is to provide anelectrification apparatus for electric dust collection having a groundunit for preventing electrification of a non-conductor disposed betweena conductive microfiber and a conductive plate and a control methodtherefor.

In addition, an objective of the present invention is to propose anelectrification apparatus for electric dust collection which is groundedor insulated, if necessary, and a control method therefor.

According to the teachings of the present invention, there is providedan electrification apparatus for electric dust collection including: aframe which forms an outer appearance, conductive microfiber which isinstalled on the frame and generate ions in air by applying a highvoltage, and conductive plates which are installed so as to surround theconductive microfiber and connected to the ground electrode to generatea potential difference with the conductive microfiber. Theelectrification apparatus further includes a ground unit which isdisposed between the conductive microfiber and the conductive plate.

At this time, the ground unit is insulated in a case where a highvoltage is applied to the conductive microfiber and is connected to theground electrode in a case where a high voltage is blocked to theconductive microfiber.

Meanwhile, According to the teachings of the present invention, there isprovided a control method for an electrification apparatus for electricdust collection including: operating a general operation mode in which ahigh voltage is applied to a conductive microfiber, a ground electrodeis connected to a conductive plate forming an electrification space inwhich the conductive microfiber is positioned at the center thereof, anelectric field is formed in the electrification space, and theconductive microfiber is discharged to generate ions in the air.

Then, it is determined whether or not a discharge mode for removingsurplus ions is necessary, and the discharge mode is operated.

According to the proposed embodiment, there is an advantage that theelectrification performance can be maintained by removing surplus ionsand the electrification efficiency can be increased.

In particular, there is an advantage that the surplus ions can beremoved through a simple switching circuit without adding a separateconfiguration. Specifically, there is an advantage that the surplus ionscan be easily removed by applying a high voltage of different polaritiesto the conductive microfiber.

In addition, there is an advantage that surplus ions can be moreeffectively removed by adding a ground unit. There is an advantage thatsurplus ions can be removed simply and effectively as the ground unit isinsulated in the general operation mode and grounded in the dischargemode.

In addition, since the ground unit can be disposed in various shapes,there is an advantage that the degree of freedom of design is highdespite the addition of the configuration.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a view illustrating an installation example of anelectrification apparatus for electric dust collection according to afirst embodiment of the present invention.

FIG. 2 and FIG. 3 are views illustrating an electrification apparatusfor electric dust collection according to the first embodiment of thepresent invention.

FIG. 4 is an exploded view illustrating the electrification apparatusfor electric dust collection

FIG. 5 is a diagram illustrating a control configuration of anelectrification apparatus for electric dust collection according to thefirst embodiment of the present invention.

FIG. 6 is a diagram illustrating a control flow of the electrificationapparatus for electric dust collection according to the first embodimentof the present invention.

FIG. 7 is a view illustrating an electrification apparatus for electricdust collection according to the second embodiment of the presentinvention.

FIG. 8 is an enlarged view of a portion A in FIG. 7.

FIG. 9 is a diagram illustrating a control configuration of anelectrification apparatus for electric dust collection according to thesecond embodiment of the present invention.

FIG. 10 is a diagram illustrating a control flow of the electrificationapparatus for electric dust collection according to the secondembodiment of the present invention.

FIG. 11 is a view illustrating an electrification apparatus for electricdust collection according to a third embodiment of the presentinvention.

FIG. 12 is a view illustrating an electrification apparatus for electricdust collection according to a fourth embodiment of the presentinvention.

FIG. 13 is a view illustrating an electrification apparatus for electricdust collection according to a fifth embodiment of the presentinvention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Hereinafter, some embodiments of the present invention will be describedin detail with reference to exemplary drawings. It is to be noted that,in adding reference numerals to the constituent elements of thedrawings, the same constituent elements are denoted by the samereference numerals whenever possible, even if the same constituentelements are illustrated in different drawings. In addition, in thefollowing description of the embodiments of the present invention, adetailed description of known functions or configurations incorporatedherein will be omitted in a case where it is determined that thedetailed description thereof hinders understanding of the embodiment ofthe present invention.

In addition, in describing the constituent elements of the embodiment ofthe present invention, terms such as first, second, A, B, (a), and (b)may be used. These terms are intended to distinguish the constituentelements from other constituent elements, and the terms do not limit thenature, order or sequence of the constituent elements. In a case where aconstituent element is described as being “connected”, “coupled”, or“accessed” to another constituent element, although the constituentelement may be directly connected or accessed to the other constituentelement, it should be understood that another constituent element may be“connected”, “coupled”, or “accessed” between the respective constituentelements.

FIG. 1 is a view illustrating an installation example of anelectrification apparatus for electric dust collection according to thefirst embodiment of the present invention.

As illustrated in FIG. 1, an electrification apparatus 100 for anelectric dust collection according to the teachings of the presentinvention can be installed in an air conditioner 1 for a vehicle.However, this is an example and the electrification apparatus 100 forelectric dust collection (hereinafter, electrification apparatus) may beinstalled independently or installed in another product.

In addition, the electrification apparatus 100 may be installed in theair conditioner 1 for a vehicle together with the collector 200. Theelectrification apparatus 100 and the collector 200 may be referred toas an electric dust collection assembly 10.

First, the air conditioner 1 for a vehicle will be briefly described.

The air conditioner 1 for a vehicle includes a main body 11, 15 whichforms an outer appearance. The main body may be divided into a suctionmain body 11 on which the suction port 20 is formed and a discharge mainbody 15 in which the discharge port 30 is formed.

The suction main body 11 and the discharge main body 15 are connected toeach other to allow air to flow. Specifically, the suction main body 11and the discharge main body 15 are connected to each other so that airflows from the suction main body 11 to the discharge main body 15.However, this is an example, and the air conditioner 1 for a vehicle maybe provided as an integral main body.

A plurality of the suction port 20 and a plurality of the discharge port30 may be formed in the suction main body 11 and the discharge main body15, respectively.

The suction port 20 includes an indoor suction port 21 and an outdoorsuction port 22. The indoor suction port 21 is understood as an openingthrough which the air inside the vehicle provided with the airconditioner 1 for a vehicle flows into the inside of the main body 11.In addition, it is to be understood that the outdoor suction port 22 isan opening through which the outside air of the vehicle flows into theinside of the main body 11.

The discharge port 30 includes a front discharge port 31 and a defrostdischarge port 32. The front discharge port 31 is understood as anopening through which the air discharged from the main body 11 flowsinto the inside of the vehicle. In addition, the defrost discharge port32 is understood as an opening through which the air discharged from themain body 11 flows into the windshield of the vehicle. Through thedefrost discharge port, it is possible to remove frost formed in thewindshield of the vehicle.

This is an example, and the suction port 20 and the discharge port 30may be formed in various positions and numbers. For example, thedischarge port 30 may further include a discharge port that dischargesair to the lower side of the vehicle or a discharge port that dischargesair to the rear side of the vehicle.

In addition, the air conditioner 1 for a vehicle includes a fan and aheat exchanger installed inside the main bodies 11 and 15 but is omittedin FIG. 1 for the convenience of illustration.

Specifically, a fan may be installed inside the suction main body 11. Inother words, the fan can be disposed adjacent to the suction port 20. Asthe fan is driven, air flows into the suction main body 11 through thesuction port 20. Then, air can flow from the suction main body 11 to thedischarge main body 15.

A heat exchanger or a heater may be disposed in the discharge main body15. Accordingly, the air flowing into the discharge main body 15 passesthrough the heat exchanger or the like and can be cooled or heated andmay be discharged to the inside of the vehicle through the dischargeport 30.

In addition, the air conditioner 1 for a vehicle may further include aplurality of suction ports 20 and a damper (not illustrated) forselectively opening the discharge ports 30. For example, the damper mayopen any one of the indoor suction port 21 and the outdoor suction port22 and close the other. In addition, the damper may open at least one ofthe plurality of discharge ports 30.

In addition, in the air conditioner 1 for a vehicle according to theteachings of the present invention, an electric dust collection assembly10 is installed. The electric dust collection assembly 10 corresponds toa configuration in which dust particles or the like in the air flowinginto the air conditioner 1 for a vehicle are electrified and collected.

At this time, the electric dust collection assembly 10 may be installedin another product other than the air conditioner 1 for a vehicle.Accordingly, FIG. 1 corresponds to an example in which the electric dustcollection assembly 10 is installed. In addition, the electric dustcollection assembly 10 may be installed in an independent product (forexample, an air purifier) to remove dust particles in the air.

The electric dust collection assembly 10 includes an electrificationapparatus 100 for electric dust collection (hereinafter, electrificationapparatus) and a collector 200 for electric dust collection(hereinafter, collector).

The electrification apparatus 100 functions to electrify foreign matterssuch as dust particles in the air. The collector 200 functions tocollect dust particles and the like electrified by the electrificationapparatus 100 and remove dust particles and the like from the air.

The electrification apparatus 100 includes the conductive microfiber 120and the conductive plate 130, which will be described later. A highvoltage is applied to the conductive microfiber 120, and a groundelectrode is applied to the conductive plate 130.

Accordingly, the electrification apparatus 100 generates ions in the airto form an electric field. At this time, it is understood that theconductive plate 130 generates a potential difference with theconductive microfiber 120 to form an electric field. In addition,electrified particles can be collected on the conductive plate 130.

The collector 200 may be made of various materials collecting theelectrified particles by the electrification apparatus 100. For example,the collector 200 may be a porous fiber filter such as a nonwovenfabric. The surface of the collector 200 may be applied, coated orattached with a conductive material. Then, a predetermined current isapplied to the collector 200, so that the electrified dust particles andthe like can be collected.

In summary, dust particles or the like in the air passing through theelectric dust collection assembly 10 are coupled with the ions generatedin the electrification apparatus 100 and are electrified. Theelectrified dust particles and the like can be collected in theelectrification apparatus 100 or the collector 200.

Thus, the electrification apparatus 100 can function not only togenerate ions but also to collect electrified dust particles and thelike. Therefore, the electrification apparatus 100 may be referred to asa ‘primary filter’ and the collector 200 as a ‘secondary filter’. Dustparticles or the like in the air can be removed more easily as dustparticles or the like in the air pass through the primary filter and thesecondary filter in order.

At this time, in the electric dust collection assembly 10 according tothe teachings of the present invention, the electrification apparatus100 and the collector 200 are provided as separate devices, and thus isreferred to as “assembly” in which a separate device is assembled oradjacently installed.

Specifically, the electrification apparatus 100 and the collector 200can be produced and distributed through different manufacturingprocesses and distribution processes. In addition, the electrificationapparatus 100 and the collector 200 may be coupled to each other by aseparate coupling member or the like.

In addition, as described above, the electrification apparatus 100 canperform both the function of generating ions and the function ofcollecting dust particles. Accordingly, the electrification apparatus100 may be installed as an independent product separately from thecollector 200.

In other words, the electrification apparatus 100 may be installed in ageneral air conditioner or other products other than the air conditioner1 for a vehicle. In addition, the electrification apparatus 100 may beinstalled independently.

In addition, the electrification apparatus 100 and the collector 200 maybe installed in a predetermined product, respectively. For example, theelectrification apparatus 100 and the collector 200 may be installed inthe air conditioner 1 for a vehicle, respectively.

With reference to FIG. 1, the air conditioner 1 for a vehicle isprovided with a dust collection installation portion 13 on which theelectric dust collection assembly 10 is installed. Specifically, thedust collection installation portion 13 is formed in the suction mainbody 11 adjacent to the suction port 20. Particularly, the dustcollection installation portion 13 is disposed at the lower side in theflow direction of the air flowing into the suction port 20.

This is because the air flowing into the suction port 20 is firstlypassed through the electric dust collection assembly 10. In summary, theair flowing into the air conditioner 1 for a vehicle passes through theelectric dust collection assembly 10 first, and dust particles and thelike can be removed. Accordingly, it is possible to prevent foreignmatters from adhering to the fan, the heat exchanger, and the like.

In addition, the air conditioner 1 for a vehicle is provided with a faninstallation portion 12 on which the fan is installed. Specifically, thefan installation portion 12 is formed in the suction main body 11adjacent to the suction port 20. Particularly, the fan installationportion 12 is disposed below the flow direction of air in the dustcollection installation portion 13.

Therefore, in the suction main body 11, the suction port 20, the dustcollection installation portion 13, and the fan mounting unit 12 aredisposed in order in the air flow direction. Accordingly, the airflowing into the suction port 20 passes through the electric dustcollection assembly 10 and the fan in order and flows into the dischargemain body 15.

At this time, the electrification apparatus 100 and the collector 200may be installed in the dust collection installation portion 13,respectively. Particularly, the collector 200 is disposed below in theflow direction of air in the electrification apparatus. Accordingly, theair flowing into the suction port 20 can pass through theelectrification apparatus 100 and the collector 200 in order.

The electrification apparatus 100 may be installed in the dustcollection installation portion 13 in a state where the collector 200 isseated. In other words, the electrification apparatus 100 and thecollector 200 may be overlapped and seated on the dust collectioninstallation portion 13.

In addition, a portion for fixing the electrification apparatus 100 maybe formed on the inside of the dust collection installation portion 13.Accordingly, the electrification apparatus 100 may be installed in thedust collection installation portion 13, and the collector 200 may beinstalled in the lower portion of the electrification apparatus 100.

As described above, the electrification apparatus 100 and the collector200 can be managed, respectively, since the electrification apparatus100 and the collector 200 are installed, respectively. For example, theuser can separate, replace, and clean the collector 200 only in the airconditioner 1 for a vehicle.

In particular, the replacement cycles of the electrification apparatus100 and the collector 200 may be different from each other. Generally,since a larger amount of dust particles are collected in the collector200, the replacement cycle of the collector 200 can be shorter than thatof the electrification apparatus 100. Therefore, the user can replaceonly the collector 200 without the need to separate the electrificationapparatus 100.

Hereinafter, the electrification apparatus 100 will be described indetail.

FIGS. 2 and 3 are views illustrating an electrification apparatus forelectric dust collection according to the first embodiment of thepresent invention, and FIG. 4 is an exploded view illustrating theelectrification apparatus for electric dust collection according to thefirst embodiment of the present invention.

FIG. 2 is a front perspective view of the electrification apparatus 100,and FIG. 3 is a rear perspective view of the electrification apparatus100. In addition, FIG. 4 is a front perspective view of theelectrification apparatus 100 in which the respective components areseparated.

In addition, for the convenience of explanation, FIGS. 2 to 4 illustrateX, Y, and Z axes perpendicular to each other. In this case, the X, Y,and Z axes are illustrated to illustrate the relationship between eachother, and the (+) and (−) directions of each axis are notdistinguished.

As illustrated in FIGS. 2 to 4, the electrification apparatus 100includes a frame 110 which forms an outer appearance, conductivemicrofiber 120 which is provided on the frame 110, and a conductiveplate 130.

The frame 110 is understood as a configuration for disposing and fixingthe conductive microfiber 120 and the conductive plate 130 atpredetermined positions. In addition, the frame 110 may be mounted in aspace in which the electrification apparatus 100 is installed, forexample, the dust collection installation portion 13 of the airconditioner 1 for a vehicle described above.

In addition, the frame 110 is made of a nonconductive material and maybe formed of, for example, plastic. In addition, the frame 110 may beformed in various shapes through an injection process or the like.

The conductive microfiber 120 is understood as a configuration which isdischarged by a high voltage to ionize molecules in the air. Forexample, the conductive microfiber 120 can generate anions such as OH—,O—, and the like, or cations such as H+in the air.

The conductive microfiber 120 is connected to electric wires forapplying a high voltage but are omitted in FIGS. 2 to 4 for the sake ofconvenience. In addition, the conductive microfiber 120 may beunderstood as one end portion of an electric wire to which a highvoltage is applied.

In addition, the conductive microfiber 120 include carbon fibers. Thecarbon fibers are formed into superfine fibers having a diameter in themicrometer unit. When a high voltage is applied to the carbon fibers,ions are generated in the air by corona discharge.

At this time, the conductive microfiber 120 is provided in the form of acarbon brush in which hundreds or thousands of carbon fibers form onebundle. Hereinafter, one conductive microfiber 120 means one carbonbrush.

In addition, the conductive microfiber 120 is disposed on the frame 110so as to extend in the Z-axis direction. At this time, the Z-axis maycorrespond to an axis extending in the air flow direction. In summary,the conductive microfiber 120 may be disposed on the frame 110 inparallel with the flow direction of the air.

It is understood that the conductive plate 130 forms an electric fieldwith the conductive microfiber 120. In addition, a ground electric wireto which a ground electrode is applied is connected to the conductiveplate 130. Accordingly, between the conductive plate 130 and theconductive microfiber 120, a potential difference is generated and anelectric field can be formed.

In addition, electrons can be moved to the ground electrode.Accordingly, high-density ions can be generated between the conductivemicrofiber 120 and the conductive plate 130. In addition, theelectrification efficiency of dust particles and the like can beimproved due to the electric field formed between the conductivemicrofiber 120 and the conductive plate 130.

In addition, the conductive plate 130 is formed of a conductive materialsuch as metal. Accordingly, the conductive plate 130 can be understoodas a metal plate having a predetermined thickness.

In addition, since the conductive plate 130 is provided as a flat platehaving a predetermined area along the Z-axis, predetermined dustparticles and the like can be collected. In other words, the electrifieddust particles and the like can be collected in the conductive plate130. Therefore, the electrification apparatus 100 can also perform afunction of collecting the electrified dust particles and the like.

In addition, the conductive plate 130 is disposed to surround theconductive microfiber 120. Specifically, the conductive plate 130 formsa predetermined space to surround the conductive microfiber 120.

Hereinafter, the space formed by the conductive plate 130 is referred toas an electrification space 132. At this time, the electrification space132 means space closed in the X-Y-axis direction by the conductive plate130 and opened in the Z-axis direction.

In particular, the conductive plate 130 according to the teachings ofthe present invention forms a square columnar space.

Specifically, the electrification space 132 has a rectangular shape on aplane, and a rectangular columnar space extending in the Z-axis can beformed. At this time, the rectangular shape formed on the X-Y plane maycorrespond to a square. In other words, the electrification space 132can be understood as a square columnar space.

The conductive microfiber 120 is positioned at the center of theelectrification space 132. Specifically, the conductive microfiber 120is positioned at the center of the electrification space 132 on the X-Yplane and extend in the Z-axis.

At this time, the electrification space 132 refers to a space formed tosurround one conductive microfiber 120. Therefore, the electrificationspace 132 may be formed corresponding to the number of the conductivemicrofibers 120.

In summary, the conductive plate 130 forms a rectangular cross-sectionperpendicular to the flow direction of air. The conductive microfiber120 is positioned at the center of a rectangular cross-section.

The electrification apparatus 100 may include a plurality of conductivemicrofibers 120. The conductive plate 130 may form a plurality ofelectrification spaces 132 corresponding to the plurality of conductivemicrofibers 120.

The plurality of conductive microfibers 120 are disposed apart from eachother in the X-Y plane. In addition, each of the conductive microfibers120 may be disposed at the same interval as the neighboring conductivemicrofibers 120. In addition, the plurality of conductive microfibers120 may be arranged in parallel with the adjacent conductive microfibers120 along the X-axis or the Y-axis. For example, as illustrated in FIGS.2 to 4, six conductive microfibers 120 can be provided.

The plurality of electrification spaces 132 are formed on the X-Y planein a state of being separated from each other so as to correspond to theplurality of conductive microfibers 120. The conductive plate 130includes an outer plate 134 for forming the plurality of electrificationspaces 132 and an inner plate 136 for separating the plurality ofelectrification spaces 132.

The outer plate 134 can be understood as a configuration that forms anouter appearance of the conductive plate 130. Specifically, the outerplate 134 may be provided in a rectangular frame shape.

The outer plate 134 forms a space in which the plurality ofelectrification spaces 132 are coupled. Specifically, the outer plate134 has a rectangular shape in the X-Y plane and forms a rectangularcolumnar space extending in the Z-axis.

The inner plate 136 may be understood as a configuration that dividesthe space formed by the outer plate 134 into the electrification spaces132. Accordingly, both ends of the inner plate 136 can be connected tothe outer plate 134. In particular, the inner plate 136 extends in theX-axis or the Y-axis. For example, the inner plate 136 may divide thespace formed by the outer plate 134 into six electrification spaces 132.

At this time, the outer plate 134 and the inner plate 136 may beintegrally formed with each other. Alternatively, the outer plate 134and the inner plate 136 may be separately fabricated and coupled witheach other.

In the electrification apparatus of the related art, the electrificationspace is formed into a cylindrical shape around the conductivemicrofibers. Thereby, air cannot flow between the electrificationspaces, or a death zone can be formed which cannot be electrified.

However, in a case where the electrification space is formed into asquare columnar shape as in the present invention, there is no deadspace between the electrification spaces. Therefore, the electrificationspace per the same space can be maximized. Accordingly, the flow rate ofthe air passing through the electrification space can be maximized.

The frame 110 includes a main body frame 112 on which the conductiveplate 130 is installed and an installation frame 114 on which theconductive microfibers 120 are installed.

The main body frame 112 can be understood as a configuration that formsan outer appearance of the frame 110. In addition, the outer plate 134may be fitted to the main body frame 112. Accordingly, the main bodyframe 112 is provided in a shape corresponding to the outer plate 134.

Therefore, the main body frame 112 is provided in a rectangular frameshape as in the outer plate 134. Specifically, the outer plate 134 isinstalled on the main body frame 112 such that the outer surface of theouter plate 134 is in contact with the inner surface of the main bodyframe 112.

In addition, the main body frame 112 is provided with a plurality offixing protrusions 112 a which are in contact with the inner surface ofthe outer plate 134. In addition, the outer plate 134 may be fixed tothe main body frame 112 by means of a bonding member such as a bond.

In addition, the frame 110 further includes a cover frame 116 coupled toan upper end of the main body frame 112. The cover frame 116 may becoupled to the main body frame 112 to cover the upper end of the outerplate 134. In other words, the outer plate 134 may be fixed in theZ-axis by coupling of the main body frame 112 and the cover frame 116.

The cover frame 116 and the main body frame 112 can be hooked. Forexample, the main body frame 112 may have a hook 112 b protrudingoutwardly, and the cover frame 116 may be formed with a hook groove 116a into which the hook 112 b is inserted.

In addition, the main body frame 112 is formed with a frame installationportion 112 c protruding outwardly and extending along the main bodyframe 112. The frame installation portion 112 c may correspond to aportion which is seated in a product on which the electrificationapparatus 100 is installed.

For example, protrusions on which the frame installation portion 112 cis seated may be formed on the inside of the dust collectioninstallation portion 13. Therefore, the electrification apparatus 100may be installed in the dust collection installation portion 13 suchthat the frame installation portion 112 c is seated on the protrusion.

In addition, the frame installation portion 112 c may be formed on theouter surface of the main body frame 112. In other words, the frameinstallation portion 112 c may be formed on all four surfaces formingthe main body frame 112. Accordingly, the electrification apparatus 100can be installed by the frame installation portion 112 c irrespective ofthe direction in which the electrification apparatus 100 is installed inthe product.

For example, the main body frame 112 or the conductive plate 130 isformed as a rectangular frame having a long surface and a short surface.With reference to FIG. 1, the electrification apparatus 100 is insertedinto the dust collection installation portion 13 such that end surfaceof the electrification apparatus 100 is disposed on both sides of thedust collection installation portion 13. Accordingly, the frameinstallation portion 112 c formed on the end surface of the main bodyframe 112 can be seated on the inner surface of the dust collectioninstallation portion 13.

The installation frame 114 is installed in an inside of the main bodyframe 112 in a state of extending into one side. In other words, bothends of the installation frame 114 are fixed to the main body frame 112.In the installation frame 114, a fixing groove 114 a into which theconductive microfibers 120 are inserted is formed. At this time, thefixing grooves 114 a are formed to correspond to the number of theconductive microfibers 120.

In addition, the frame 110 may further include an auxiliary frame 118.The auxiliary frame 118 can be understood as a configuration thatmaintains the rigidity of the frame 110. In other words, the auxiliaryframe 118 corresponds to a configuration for preventing the main bodyframe 112 and the installation frame 114 from being deformed.Accordingly, the auxiliary frame 118 may have various shapes accordingto the design and may be omitted.

As described above, the frame 110 may be formed by an injection process.Accordingly, although the frame 110 has been described Specifically, theframe 110 may be integrally formed.

As described above, the conductive microfibers 120 generate ions intothe air, and dust particles in the air can be coupled with ions to beelectrified. Thus, the ions coupled with the dust particles arecollected in the conductive plate 130 or in a separate collector.

At this time, ions generated in the air by the conductive microfibers120 but not coupled with dust particles (hereinafter, surplus ions) mayexist. The surplus ions float in the electrification space 132 and canbe coupled to the frame 110 or the like. Accordingly, the frame 110 canbe electrified.

The electric field formed in the electrification space 132 may beweakened as the frame 110, particularly the frame 110 positioned at theelectrification space 132, is electrified. Specifically, the surplusions are disposed between the conductive microfibers 120 and theconductive plate 130 to reduce the potential difference.

In addition, the surplus ions can electrify not only the frame 110 butalso the inside of the product in which the electrification apparatus100 is installed. Accordingly, there is a problem that the operation ofthe product may be affected or the stability of the user may increase.

Therefore, it is necessary to remove the surplus ions to prevent theabove problems. The electrification apparatus according to the teachingsof the present invention can remove the surplus ions through a switchingcircuit. Hereinafter, it will be described specifically.

FIG. 5 is a diagram illustrating a control configuration of anelectrification apparatus for electric dust collection according to thefirst embodiment of the present invention.

As illustrated in FIG. 5, the electrification apparatus 100 for electricdust collection according to the teachings of the present invention isprovided with a control unit 300 for controlling various configurations.At this time, the control unit 300 may correspond to a control unitprovided in the product in which the electrification apparatus 100 isinstalled.

In addition, the electrification apparatus 100 includes a power sourceunit 310, an input unit 320, a sensor 330, and a timer 340. Such aconfiguration is complementary and exemplary, and only a portion of theconfiguration may be provided or the configuration may be replaced withanother configuration. In addition, the configuration may correspond toa configuration provided in a product in which the electrificationapparatus 100 is installed.

The power source unit 310 can be understood as a configuration forturning on/off the power source of the electrification apparatus 100.For example, in a case where the electrification apparatus 100 isinstalled in the air conditioner 1 for a vehicle, the power source unit310 may correspond to a power button of the air conditioner 1 for avehicle. The power source unit 310 may be provided separately from theair conditioner 1 for a vehicle.

The input unit 320 can be understood as a configuration capable ofselecting an additional function of the electrification apparatus 100.For example, the input unit 320 may adjust the intensity of the voltageapplied to the electrification apparatus 100 or adjust the flow rate ofthe air passing through the electrification apparatus 100. In addition,the input unit 320 may be provided to select a discharge mode to bedescribed later.

The sensor 330 can be understood as a configuration for detectingvarious states of the electrification apparatus 100. For example, thesensor 330 may be provided to detect dust particles in the air flowinginto the electrification apparatus 100. In addition, the sensor 330 maybe provided to detect whether or not the dust particles are electrifiedin the discharge mode to be described later.

The timer 340 can be understood as a configuration for measuring thetime associated with the operation of the electrification apparatus 100.For example, the timer 340 may be provided to measure the operation timeof the electrification apparatus 100.

The control unit 300 may apply a predetermined electrode to theconductive microfibers 120 and the conductive plates 130.

Specifically, the control unit 300 may connect a ground electrode 380 tothe conductive plate 130. The ground electrode 380 may refer to areference point of a voltage, that is, a voltage of zero. For example,the ground electrode 380 may correspond to a ground or a conductor thatmay be replaced with the ground.

In addition, the control unit 300 may connect a high voltage generator370 to the conductive microfibers 120. Accordingly, a high voltage maybe applied to the conductive microfibers 120 and the conductivemicrofibers 120 may be discharged to generate ions in the air.

At this time, the control unit 300 may transmit an operation signal tothe high voltage generator 370 through any one of a first switch 350 anda second switch 360. At this time, the first switch 350 and the secondswitch 360 may correspond to one switching circuit. In other words, thecontrol unit 300 may selectively transmit an operation signal to thehigh voltage generator 370.

In addition, the first switch 350 and the second switch 360 maycorrespond to a switch circuit that is turned on and off, respectively.In other words, the first switch 350 and the second switch 360 may beturned on or off, respectively.

In a case where the control unit 300 transmits a signal to the firstswitch 350, the high voltage generator 370 may generate a first highvoltage. In addition, in a case where the control unit 300 transmits asignal to the second switch 360, the high voltage generator 370 maygenerate the second high voltage.

The first high voltage and the second high voltage may correspond tovoltages of different electrodes from each other. In addition, theintensities of the first high voltage and the second high voltage may bethe same.

For example, the first high voltage may be a (+) voltage and the secondhigh voltage may be a (−) voltage. Accordingly, when the control unit300 transmits a signal to the first switch 350, a (+) high voltage maybe applied to the conductive microfibers 120. On the other hand, whenthe control unit 300 transmits a signal to the second switch 360, a (−)high voltage may be applied to the conductive microfibers 120.

Hereinafter, a control method for removing the surplus ions will bedescribed with such a configuration.

FIG. 6 is a diagram illustrating a control flow of the electrificationapparatus for electric dust collection according to the first embodimentof the present invention.

FIG. 6 illustrates a control flow in a case where it is necessary toremove the surplus ions during the operation of the electrificationapparatus 100. Therefore, the description will be made on the premisethat the electrification apparatus 100 is operated.

As illustrated in FIG. 6, the first switch 350 is turned on and thesecond switch 360 is turned off (S100). In a case where the control unit300 transmits a signal to the first switch 350, it can be understoodthat the first switch 350 is turned on. In addition, in a case where thecontrol unit 300 does not transmit a signal to the second switch 360, itcan be understood as a state where the second switch 360 is turned off.

It can be understood as a state where, on the electric circuit, eitherone of the two wires connected to the high voltage generator 370 isconnected and the other is not connected.

Accordingly, the signal of the first switch 350 is transmitted to thehigh voltage generator 370. The high voltage generator 370 applies thefirst high voltage to the conductive microfibers 120 (S110).

For example, in a state where the first high voltage is a (+) voltage,the conductive microfibers 120 are discharged to generate (+) ions inthe air. Accordingly, (+) ions float in the electrification space 132and can couple with the dust particles to electrify the dust particles.(+) ions in the air that are not coupled with the dust particles becomesurplus ions.

In other words, the surplus ions correspond to (+) ions. The surplusions are attached to the frame 110 disposed in the electrification space132 to electrify the frame 110. In particular, the installation frame114 may be electrified by the surplus ions.

At this time, it is determined whether it is necessary to remove thesurplus ions. In other words, it is determined whether or not adischarge is required (S120). The necessity of the discharge may bedetermined by the input unit 320, the sensor 330, the timer 340, and thelike.

A discharge may be requested through the input unit 320. For example,the input unit 320 may include a button for selecting the dischargemode. At this time, the discharge mode means a mode for removing thesurplus ions.

In addition, it is possible to detect whether or not a discharge isrequired by the sensor 330. For example, the sensor 330 senses dustparticles in the air and can measure a dust particle removal rate by theelectrification apparatus 100. Accordingly, in a case where the dustparticle removal rate is equal to or less than a predetermined value, itis possible to operate in the discharge mode.

Alternatively, the sensor 330 may measure whether or not theinstallation frame 114 is electrified. Generally, since the installationframe 114 is made of a non-conductive material such as plastic,electricity does not pass therethrough. Accordingly, the sensor 330 candetermine whether or not a current flows in the installation frame 114and measure whether or not the installation frame is electrified.Particularly, in a case where the current flowing in the installationframe 114 exceeds a predetermined level, the discharge mode can beoperated.

In addition, the sensor 330 measures the removal rate or whether or notelectrified, and can visualize the removal rate or whether or notelectrified. For example, it is possible to activate the discharge modeselection button or to inform the user of the fact that the operation ofthe discharge mode is necessary through the audio or display unit.Accordingly, the user can operate the electrification apparatus 100 inthe discharge mode through the input unit 320.

In addition, the discharge mode can be operated in accordance with theoperation time measured by the timer 340. For example, the first highvoltage may be applied to the conductive microfibers 120 and may beoperated in the discharge mode after 30 minutes. In other words, theelectrification apparatus 100 can be operated in the discharge mode atpredetermined time intervals.

In a case where it is determined that the discharge is necessaryaccording to the above conditions, the electrification apparatus 100 canbe operated in the discharge mode. In the discharge mode, the firstswitch 350 is turned off and the second switch 360 is turned on (S130).

It can be understood as a state where, on the electric circuit, one,which is connected, of the two wires connected to the high voltagegenerator 370 is not connected and the other, which is not connected, ofthe two wires is connected. In other words, the discharge mode isswitched in the general operation mode and a high voltage is applied tothe conductive microfibers 120.

Accordingly, the signal of the second switch 360 is transmitted to thehigh voltage generator 370. The high voltage generator 370 applies asecond high voltage to the conductive microfibers 120 (S140).

As described above, in a case where the first high voltage is a (+)voltage, the second high voltage corresponds to a (−) voltage.Accordingly, the conductive microfibers 120 are discharged to generate(−) ions into the air. Accordingly, a (−) ions float in theelectrification space 132 and can be coupled with surplus ions which are(+) ions. In other words, the surplus ions can be removed.

At this time, the discharge mode may be operated for a predetermineddischarge time. The discharge time may correspond to a predeterminedtime. For example, in a case where the discharge mode is input throughthe input unit 320, the discharge mode may be operated for 10 minutes.In addition, the discharge mode may be operated until the value detectedby the sensor 330 becomes general.

Accordingly, it is determined whether or not the discharge time haselapsed (S150), in a case where the discharge time has elapsed, thegeneral operation mode is again operated. In other words, the firstswitch 350 is turned on and the second switch 360 is turned off (S160),and the first high voltage is applied to the conductive microfibers 120.

In addition, the discharge mode may not exist separately, and the firsthigh voltage or the second high voltage may alternately be applied tothe conductive microfibers 120. In other words, the first switch 350 andthe second switch 360 can be switched at predetermined time intervals.

For example, the first switch 350 and the second switch 360 may beswitched at intervals of 30 minutes. Accordingly, the conductivemicrofibers 120 generate (+) ions for 30 minutes, and then generate (−)ions for 30 minutes. Therefore, the surplus ions generated for 30minutes can be removed by the ions generated thereafter.

The surplus ions can be removed through such a process.

Hereinafter, another embodiment of the electrification apparatus 100will be described. At this time, the same reference numerals are usedfor the same components as those described above, and a descriptionthereof is referred.

FIG. 7 is a view illustrating an electrification apparatus for electricdust collection according to a second embodiment of the presentinvention, and FIG. 8 is an enlarged view of a portion A in FIG. 7.

As illustrated in FIGS. 7 and 8, the conductive microfibers 120 areinstalled in the frame 110. Specifically, the conductive microfibers 120may be installed in the installation frame 114.

In addition, the installation frame 114 may be formed with a hole intowhich the conductive microfiber 120 is inserted. The holes are formedsuch that the conductive microfibers 120 are positioned at a center ofthe electrification space 132. Accordingly, when the conductivemicrofiber 120 is fitted in the holes, the conductive microfibers 120can be disposed at the correct positions.

The electrification apparatus 100 for electric dust collection accordingto the teachings of the present invention further includes a ground ring140. The ground ring 140 is provided in a ring shape to surround theouter side of the conductive microfiber 120. In particular, the groundring 140 may be in close contact with the conductive microfibers 120.

In addition, the ground ring 140 may be disposed between the conductivemicrofibers 120 and the installation frame 114. Therefore, the groundring 140 may function as a fixing support portion for fixing theconductive microfibers 120 to the installation frame 114.

In addition, the ground ring 140 can prevent direct close contactbetween the installation frame 114 and the conductive microfibers 120.In addition, the ground ring 140 is formed of a conductive material andmay be connected to the ground electrode 380.

As described above, the surplus ions are generated, and the installationframe 114 can be conducted. Particularly, since more ions are generatedat a portion adjacent to the conductive microfibers 120, the amount ofthe surplus ions may be large. In other words, as the conductivemicrofibers 120 are closer to the conductive microfibers 120, there maybe a lot of surplus ions.

In addition, surplus ions positioned adjacent to the conductivemicrofibers 120 further decreases the electrification efficiency. Inother words, it is necessary to more effectively remove surplus ionspositioned adjacent to the conductive microfibers 120.

The electrification apparatus according to the teachings of the presentinvention can effectively remove surplus ions positioned adjacent to theconductive microfibers 120 through the ground ring 140. Hereinafter, itwill be described in detail.

FIG. 9 is a diagram illustrating a control configuration of anelectrification apparatus for electric dust collection according to asecond embodiment of the present invention.

As illustrated in FIG. 9, the control unit 300 may transmit signals tothe first to fourth switches 400, 410, 420, and 430. Accordingly, apredetermined electrode may be connected to the conductive microfibers120, the conductive plate 130, and the ground ring 140.

At this time, the first to fourth switches 400, 410, 420, and 430 maycorrespond to switch circuits that are turned on and off, respectively.In other words, the first to fourth switches 400, 410, 420, and 430 maybe turned on or off, respectively.

In a case where the control unit 300 transmits a signal to the firstswitch 400, the high voltage generator 370 may apply a high voltage tothe conductive microfibers 120. At this time, the applied high voltagemay correspond to a (+) or (−) voltage. The conductive microfibers 120are discharged to generate ions in the air.

In a case where the control unit 300 transmits a signal to the secondswitch 410, the ground electrode 380 is applied to the conductivemicrofibers 120. In other words, the conductive microfibers 120 may begrounded.

At this time, the first switch 400 and the second switch 410 maycorrespond to one switching circuit. In other words, the control unit300 may apply a high voltage or a ground electrode to the conductivemicrofibers 120. In addition, in a case where both the first switch 400and the second switch 410 are turned off, the conductive microfibers 120may be insulated.

In a case where the control unit 300 transmits a signal to the thirdswitch 420, the ground electrode 380 is applied to the conductive plate130. Accordingly, a potential difference is generated between theconductive plate 130 and the conductive microfibers 120 to which a highvoltage is applied. An electric field may be formed in theelectrification space 132.

In a case where the control unit 300 transmits a signal to the fourthswitch 430, the ground electrode 380 is applied to the ground ring 140.In addition, in a case where the fourth switch 430 is turned OFF, theground ring 140 can be insulated.

Hereinafter, a control method for removing the surplus ions will bedescribed with such a configuration.

FIG. 10 is a diagram illustrating a control flow of the electrificationapparatus for electric dust collection according to the secondembodiment of the present invention.

FIG. 10 illustrates a control flow in the case where it is necessary toremove the surplus ions during operation of the electrificationapparatus 100. Therefore, the description will be made on the premisethat the electrification apparatus 100 is operated.

As illustrated in FIG. 10, the first and third switches 400 and 420 areturned on and the second and fourth switches 410 and 430 are turned off(S200). In a case where the control unit 300 transmits a signal to apredetermined switch, it can be understood that the corresponding switchis turned on. In addition, in a case where the control unit 300 does nottransmit a signal to the predetermined switch, it can be understood thatthe corresponding switch is turned off.

A signal of the first switch 400 is transmitted to the high voltagegenerator 370 and a signal of the third switch 420 is transmitted to theground electrode 380. The high voltage generator 370 applies a highvoltage to the conductive microfibers 120 and the ground electrode 380is applied to the conductive plate 130 (S210).

Due to the potential difference between the conductive microfibers 120and the conductive plate 130, an electric field is formed. Theconductive microfibers 120 are discharged to generate ions in the air.This corresponds to the general operation mode of the electrificationapparatus 100.

At this time, the fourth switch 430 is turned off, and the ground ring140 is in an insulated state. In other words, in the general operationmode, the ground ring 140 simply functions to support the conductivemicrofibers 120.

Then, it is determined whether it is necessary to remove the surplusions. In other words, it is determined whether or not a discharge isrequired (S220). The necessity of the discharge may be determined by theinput unit 320, the sensor 330, the timer 340, and the like, which aredescribed above.

In a case where it is determined that the discharge is necessary, thedischarge mode is operated in which the surplus ions are removed. In thedischarge mode, the third and fourth switches 420 and 430 are turned onand the first and second switches 400 and 410 are turned off (S230).

As the first and second switches 400 and 410 are turned off, theconductive microfibers 120 are insulated. In other words, a high voltageis cut off to the electrification apparatus 100 (S240), and theconductive microfibers 120 are not discharged and do not generate ionsinto the air.

The third switch 420 is continuously turned on. In other words, theconductive plate 130 is grounded regardless of the general operationmode and the discharge mode.

As the fourth switch 430 is turned on, the ground electrode 380 isapplied to the ground ring 140. In other words, the ground ring 140 isgrounded.

In summary, in the discharge mode, the conductive microfibers 120 are inan insulated or cleaned state, and the conductive plate 130 and theground ring 140 are in a grounded state.

Accordingly, the surplus ions can be removed through the ground ring140. In particular, the ground ring 140 is disposed in contact with theconductive microfibers 120. Accordingly, surplus ions positionedadjacent to the conductive microfibers 120 through the ground ring 140can be effectively removed.

At this time, the discharge mode may be operated for a predetermineddischarge time. The discharge time may correspond to a predeterminedtime. Accordingly, it is determined whether or not the discharge timehas elapsed (S250), and in a case where the discharge time has elapsed,it is operated again in the general operation mode. In other words, whenthe first and third switches 400 and 420 are turned on and the secondand fourth switches 410 and 430 are turned off (S260), a high voltage isapplied to the conductive microfibers 120 and an electric field isformed.

In addition, the conductive microfibers 120 may be grounded in thedischarge mode. In other words, in the discharge mode, the first switch400 is turned off and the second switch 410 is turned on. In otherwords, the first switch 400 and the second switch 410 are switched.

Accordingly, surplus ions positioned adjacent to the conductivemicrofibers 120 can be removed by the conductive microfibers 120. Atthis time, the ground ring 140 may be omitted from the electrificationapparatus 100.

The surplus ions can be removed through such a process.

FIG. 11 is a view illustrating an electrification apparatus for electricdust collection according to the third embodiment of the presentinvention.

The third embodiment illustrates another embodiment of the ground ring140 and FIG. 11 can be understood as a variation of FIG. 8. Asillustrated in FIG. 11, a plurality of the ground rings 140 may beprovided.

At this time, three ground rings 140 may be provided and divided into afirst ground ring 140 a, a second ground ring 140 b, and a third groundring 140 c, respectively. For the convenience of explanation, thefollowing three grounding rings 140 will be described, but this is notlimited thereto.

The first ground ring 140 a, the second ground ring 140 b, and the thirdground ring 140 c are formed in a ring shape to surround the conductivemicrofibers 120, respectively. As described above, the conductivemicrofibers 120 correspond to a carbon brush formed of a bundle ofcarbon fibers.

Accordingly, the first ground ring 140 a, the second ground ring 140 b,and the third ground ring 140 c are provided in a shape of dividing andsurrounding the conductive microfibers 120. Accordingly, the conductivemicrofibers 120 are divided into three bundles, which are referred to asa first bundle 120 a, a second bundle 120 b, and a third bundle 120 c.

At this time, the first bundle 120 a, the second bundle 120 b, and thethird bundle 120 c correspond to those divided in the installation frame114. In other words, the first bundle 120 a, the second bundle 120 b,and the third bundle 120 c correspond to those extending to an electricwire from a predetermined electrode and divided the discharged terminalend into a plurality of strands.

Since the conductive microfibers 120 are configured with hundreds orthousands of carbon fibers, it is almost impossible for all the carbonfibers to be discharged in a case where a high voltage is applied. Inother words, some carbon fibers fail to discharge and do not generateions into the air.

At this time, when the conductive microfibers 120 are divided into aplurality of bundles 120 a, 120 b, and 120 c, the number of dischargedcarbon fibers can be increased. In other words, the discharge efficiencyof the conductive microfibers 120 increases.

In addition, since the ground rings 140 a, 140 b, and 140 c are in closecontact with the bundles 120 a, 120 b, and 120 c, respectively, surplusions can be more effectively removed in the discharge mode.

At this time, the control according to this configuration is the same asthat illustrated in FIGS. 9 and 10 and described above. In addition, thecontrol unit 300 may sequentially apply a high voltage to the bundles120 a, 120 b, and 120 c, respectively. In addition, the control unit 300may sequentially ground the ground rings 140 a, 140 b, and 140 c,respectively.

FIG. 12 is a view illustrating an electrification apparatus for electricdust collection according to the fourth embodiment of the presentinvention.

As illustrated in FIG. 12, the conductive microfibers 120 are installedin the frame 110. Specifically, the conductive microfibers 120 may beinstalled in the installation frame 114.

The electrification apparatus 100 for electric dust collection accordingto the teachings of the present invention further includes a groundsheet 150. The ground sheet 150 is provided in a net shape having aplurality of openings so that air can flow.

The ground sheet 150 is disposed in the electrification space 132. Inaddition, the ground sheet 150 may be mounted on the installation frame114. In other words, the ground sheet 150 is disposed in close contactwith the installation frame 114.

The ground sheet 150 includes a ground sheet end 150 a forming an outerappearance and a through-hole 152 opened circularly about the centerthereof. The ground sheet end 150 a is formed in a rectangular shape. Inother words, the ground sheet 150 corresponds to a rectangular sheet.

At this time, the ground sheet end 150 a is disposed apart from theconductive plate 130. In addition, the through-hole 152 is spaced apartfrom the conductive microfibers 120. In other words, the ground sheet150 is smaller than the conductive plate 130. The through hole 152 maybe formed to avoid the conductive microfibers 120.

At this time, the ground sheet 150 may function to filter relativelylarge foreign matters introduced into the electrification apparatus 100.In addition, the ground sheet 150 is provided in each electrificationspace 132, respectively. As illustrated in FIG. 12, six ground sheets150 are respectively installed in six electrification spaces 132.

At this time, the ground sheet 150 is controlled in the same manner asthe ground ring 140 described above. In other words, the ground sheet150 is insulated in the general operation mode and grounded in thedischarge mode. Accordingly, surplus ions existing in theelectrification space 132 can be effectively removed.

In particular, since the ground sheet 150 is attached to theinstallation frame 114, surplus ions attached to the installation frame114 can be effectively removed. In addition, the electrificationapparatus 100 may include the ground sheet 150 and the ground ring 140together. Accordingly, it is possible to effectively remove surplus ionsattached to the installation frame 114 and the conductive microfibers120.

FIG. 13 is a view illustrating an electrification apparatus for electricdust collection according to the fifth embodiment of the presentinvention.

As illustrated in FIG. 13, the conductive microfibers 120 are installedin the frame 110. Specifically, the conductive microfibers 120 may beinstalled in the installation frame 114. At this time, the installationframe 114 extends from the electrification space 132 toward theconductive microfibers 120.

The electrification apparatus 100 for electric dust collection accordingto the teachings of the present invention further includes a ground coil160. The ground coil 160 is provided in a state of being wound aroundthe installation frame 114. As illustrated in FIG. 13, the ground coil160 surrounds the outside of the installation frame 114 and extendsalong the installation frame 114.

At this time, the ground coil 160 is controlled in the same manner asthe grounding ring 140 and the grounding sheet 150, which are describedabove. In other words, the ground coil 160 is insulated in the generaloperation mode and grounded in the discharge mode. Accordingly, surplusions existing in the electrification space 132 can be effectivelyremoved.

In particular, since the ground coil 160 extends to surround the outsideof the installation frame 114, surplus ions attached to the installationframe 114 can be effectively removed. In addition, the electrificationapparatus 100 may include the ground coil 160 and the grounding ring 140together. Accordingly, it is possible to effectively remove surplus ionsattached to the installation frame 114 and the conductive microfibers120.

At this time, the ground ring 140, the ground sheet 150, and the groundcoil 160 may be collectively referred to as a ground unit. In otherwords, the electrification apparatus 100 according to the teachings ofthe present invention includes a ground unit which is insulated in thegeneral operation mode and grounded in the discharge mode. In addition,the ground ring 140, the ground sheet 150, and the ground coil 160 areexamples of the ground unit, and the ground unit is not limited thereto.

As described above, surplus ions can be removed through the switchingcircuit without adding a separate structure. In addition, the surplusions can be more effectively removed by adding the ground unit.

DESCRIPTION OF REFERENCE NUMERALS

-   -   1: air conditioner for vehicle    -   10: electric dust collection assembly    -   100: electrification apparatus (for electric dust collection)    -   110: frame    -   120: conductive microfiber    -   130: conductive plate    -   140, 150, 160: ground unit    -   300: control unit    -   370: high voltage generator    -   380: ground electrode

What is claimed is:
 1. An electrification apparatus for electric dustcollection comprising: a frame which forms an outer appearance, aconductive microfiber which is installed on the frame and generate ionsin the air by applying a high voltage; conductive plates which areinstalled so as to surround the conductive microfiber and connected to aground electrode to generate a potential difference with the conductivemicrofiber; and a ground unit which is disposed between the conductivemicrofiber and the conductive plate, wherein the ground unit isinsulated when a high voltage is applied to the conductive microfiberand is connected to the ground electrode when a high voltage is blockedto the conductive microfiber.
 2. The electrification apparatus forelectric dust collection according to claim 1, wherein the conductiveplates forms an electrification space in which the conductive microfiberis positioned at a center thereof and in which an electric field isgenerated, and wherein the ground unit is disposed in theelectrification space.
 3. The electrification apparatus for electricdust collection according to claim 2, wherein the conductive plates areprovided in a rectangular frame shape, and wherein the electrificationspace is a rectangular columnar shaped space.
 4. The electrificationapparatus for electric dust collection according to claim 1, wherein theframe includes a main body frame in which the conductive plates areinstalled; and an installation frame which extends from the main bodyframe and in which the conductive microfiber is installed, and whereinthe ground unit is disposed so as to be in contact with the installationframe.
 5. The electrification apparatus for electric dust collectionaccording to claim 4, wherein the ground unit includes a ground ringwhich is formed so as to surround an outside of the conductivemicrofiber and is disposed between the installation frame and theconductive microfiber.
 6. The electrification apparatus for electricdust collection according to claim 5, wherein a plurality of groundrings is provided which is formed so as to divide the conductivemicrofiber into a plurality of bundles and to surround the plurality ofbundles, respectively.
 7. The electrification apparatus for electricdust collection according to claim 4, wherein the ground unit includes aground sheet which is in close contact with a side of the installationframe and in which a plurality of openings are formed.
 8. Theelectrification apparatus for electric dust collection according toclaim 7, wherein the ground sheet includes a ground sheet end whichforms an outer appearance thereof and a through-hole which is openedcircularly about the conductive microfiber.
 9. The electrificationapparatus for electric dust collection according to claim 8, wherein theground sheet end is formed in a rectangular shape corresponding to theconductive plate and is disposed in a state of being spaced apart fromthe conductive plate.
 10. The electrification apparatus for electricdust collection according to claim 4, wherein the ground unit includes aground coil which surrounds an outside of the installation frame andextends along the installation frame.
 11. A control method of anelectrification apparatus for electric dust collection, the methodcomprising: operating a general operation mode in which a high voltageis applied to a conductive microfiber, a ground electrode is connectedto a conductive plate forming an electrification space in which theconductive microfiber is positioned at the center thereof, an electricfield is formed in the electrification space, and the conductivemicrofiber is discharged to generate ions in the air; determiningwhether or not a discharge mode for removing surplus ions is necessary;and operating the discharge mode.
 12. The control method of anelectrification apparatus for electric dust collection according toclaim 11, wherein, in the discharge mode, a high voltage of a polaritydifferent from the general operation mode is applied to the conductivemicrofiber.
 13. The control method of an electrification apparatus forelectric dust collection according to claim 11, wherein, in thedischarge mode, the conductive microfiber is connected to the groundelectrode.
 14. The control method of an electrification apparatus forelectric dust collection according to claim 11, further comprising: aground unit which is insulated in the general operation mode andconnected to the ground electrode in the discharge mode.
 15. The controlmethod of an electrification apparatus for electric dust collectionaccording to claim 14, wherein, in the discharge mode, a high voltage isblocked to the conductive fine fibers.
 16. The control method of anelectrification apparatus for electric dust collection according toclaim 14, wherein the ground unit is disposed between the conductiveplate and the conductive microfiber so as to remove surplus ionspositioned in the electrification space.
 17. The control method of anelectrification apparatus for electric dust collection according toclaim 11, wherein the discharge mode is operated, in a case where theframe in which the conductive microfiber is installed is detected asbeing electrified through a sensor.
 18. The control method of anelectrification apparatus for electric dust collection according toclaim 11, wherein the operation of the electrification apparatus isswitched from the general operation mode to the discharge mode at apredetermined time interval.
 19. The control method of anelectrification apparatus for electric dust collection according toclaim 11, wherein the electrification apparatus is operated in thedischarge mode and is operated in the general operation mode when thedischarging time has elapsed.
 20. The control method of anelectrification apparatus for electric dust collection according toclaim 11, wherein the electrification apparatus is operated in thedischarge mode in a case where the discharge mode is requested throughthe input unit.